AUDI A8 1999 D2 / 1.G AHA Engine Motronic Ignition System User Guide

AUDI A8 1999 D2 / 1.G AHA Engine Motronic Ignition System User Guide https://www.carmanualsonline.info/img/6/1044/w960_1044-0.png AUDI A8 1999 D2 / 1.G AHA Engine Motronic Ignition System User Guide

Page 11 of 34

AUDI A8 1999 D2 / 1.G AHA Engine Motronic Ignition System User Guide 28-9
      
-  Press buttons corresponding to following display 
group numbers and press -Q- button to confirm 
input. 
     
 
022: Display group 22, for cylinders 1 and 
2 
     
 023: Display group

Page 12 of 34

AUDI A8 1999 D2 / 1.G AHA Engine Motronic Ignition System User Guide 28-10
 
  
Display fields  
  
1   2   3   4  
Display group 22 1): Knock control  
Display   xxx RPM   xx.xx ms  
xx.x   
xx.x   
Display   Engine speed  
(in 40 RPM 
steps)  Engine load   Ignition a

Page 13 of 34

AUDI A8 1999 D2 / 1.G AHA Engine Motronic Ignition System User Guide      
- Check readiness code   page 01
-70
 .
     
   If Diagnostic Trouble Code (DTC) memory has 
been erased, or ECM has been disconnected, 
generate new readiness code   page 01
-73
 . 
Pa
ge 13 o

Page 14 of 34

AUDI A8 1999 D2 / 1.G AHA Engine Motronic Ignition System User Guide 28-11
 Evaluation of display groups 22, 23 and 24  Display groups: 22, 23 and 24  
Possible malfunction 
cause  
Corrective action  
Display fields: 3, 4  
  
  
All cylinders retarded more than 
10 (

Page 15 of 34

AUDI A8 1999 D2 / 1.G AHA Engine Motronic Ignition System User Guide 28-12
      
Continuation  
     
-  Disconnect 3-pin connector from Knock Sensor 
(KS) 1 -G61-. 
    
If resistance is OK (no continuity):  -  Connect multimeter US1119 (Fluke 83 or equivalent) to me

Page 16 of 34

AUDI A8 1999 D2 / 1.G AHA Engine Motronic Ignition System User Guide 28-13
 
    
If the wiring is OK:  
If the malfunction still exists (stored in DTC memory):  -  Check wiring for short circuits between terminals of 3-pin connector, 
and between connector and ECM/tes

Page 17 of 34

AUDI A8 1999 D2 / 1.G AHA Engine Motronic Ignition System User Guide 28-14
      
-  Disconnect 3-pin connector from Knock Sensor 
(KS) 2 -G66-. 
    
If resistance is OK (no continuity):  -  Connect multimeter US1119 (Fluke 83 or equivalent) to measure 
resistance bet

Page 18 of 34

AUDI A8 1999 D2 / 1.G AHA Engine Motronic Ignition System User Guide 28-15
 
    
If the wiring is OK:  
If the malfunction still exists (stored in DTC memory):  -  Check wiring for short circuits between terminals of 3-pin connector, 
and between connector and ECM/tes

Page 19 of 34

AUDI A8 1999 D2 / 1.G AHA Engine Motronic Ignition System User Guide 28-16
      
Misfire recognition, checking
 
     
Required special tools and test equipment  
     
VAG1551 or VAG1552 Scan Tool (ST) with 
VAG1551/3 adapter cable 
     
Checking  
     
-  Connect

Page 20 of 34

AUDI A8 1999 D2 / 1.G AHA Engine Motronic Ignition System User Guide 28-17
      
-  Compare displayed values with specified values 
for misfire recognition (display fields 3-4): 
  
Display groups  
  
1   2   3   4  
Display group 14: Misfire recognition   
Display
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